I have 3 holly bushes approx 30 yrs old, 15 feet height. They are situated on a steep slope and trimming them is a real pain. I would like to trim them down to manageable size so that I don't have to balance on ladder etc. but don't know what damage I'd do if I took off, say, 7 - 8 feet off top. In other words I want to butcher them. Would they come back the next year, two years etc. Any helpful suggestions would be welcome. 2nd question What is the best way/product to get rid of Chickpea weed?? Tired of handpulling.